Guide for intermediate
In some current versions of WordPress there is a conflict with a module of cache memory – Xcache, that often ends up by failing the update or more precisely by non-deleting the module correctly.
If during the update or more precisely deletion of module you receive an error – the solution is to add the following line at the beginning of .htaccess file (if you do not have .htaccess file, you can create it via FTP):
php_flag xcache.cacher Off
After that the update should work with no issues. If not, do not hesitate to contact us.